CN1263343A

CN1263343A - Optical disk driver

Info

Publication number: CN1263343A
Application number: CN00100708A
Authority: CN
Inventors: 有吉祐二; 田中彻; 胁川政直; 石冈清
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 1999-02-01
Filing date: 2000-02-01
Publication date: 2000-08-16
Anticipated expiration: 2020-02-01
Also published as: JP2000222803A; US6741536B1; GB2347263A; CN1174407C; US6886176B2; CN1259663C; DE10003894A1; US20030193874A1; CN1545090A; JP3609952B2; GB2347263B; GB0002315D0; SG102565A1; DE10003894B4

Abstract

An optical disk drive includes a turntable, a first motor for turntable drive, an optical pickup and a drive mechanism arranged on a drive base and a separate traverse base that floats on the drive base. A loading drive mechanism drives a disk loading mechanism. A second motor can be driven in forward and reverse directions to supply drive power to the loading drive mechanism and a pickup drive mechanism. A drive power transfer path switching mechanism is used to switch the path through which drive power from the second motor is transferred to supply power to the loading drive mechanism and pickup drive mechanism. By continuously driving the second motor in one direction, then moving the optical pickup, raising or lowering the turntable, and transporting a disk can be accomplished in this sequence substantially continuously. By reversing the direction of motor drive, these operations can be accomplished substantially continuously in reverse direction in reverse sequence.

Description

CD drive

The present invention relates to a kind of CD drive (also being called disk drive for short), be used for recording data signal and/or reproduction and be recorded in data-signal on the CD (also be called dish for short, as data storage medium) at this at this.Compact disc or CD are the examples of this data storage medium.

The such disk drive that the present invention relates to has an opening on its front panel, disc holder opens and closes by this opening.After this carriage was opened, a dish was contained on the carriage, and this carriage cuts out automatically, arrived turntable in the disk drive of promptly withdrawing.

When putting into dish in such disk drive, dish is fixed between turntable and the clip, and is driven with specific rotating speed, like this, in such as read operation, can be by disk drive (i.e. record and the transcriber) data-signal of playback record on dish.More particularly, data are recorded in the recording channel of specific region of dish, and the recording channel address of signal as required drives the optical pickup that is used for read output signal, just can reproduce the signal that needs.

Such disk drive has three basic operations that need drive motor: (1) loading tray, thus on the both direction between the load/unload position of the dish load/unload position of disk drive outside and disk drive inside driven bracket, Pan Zhuanzai/Xie Zaiweizhichu in the disk drive outside, dish can be placed on the carriage or from carriage and take off, load/unload position place in disk drive inside, dish is installed in turntable or unloads from it; (2) driving-disc drives turntable thus with rotating disc; And (3), driving read head, mainly between the dish periphery and the position in interior week, drive optical pickup thus.

Typical disk drive according to relevant prior art also uses independent motor, i.e. three independent motors are as the drive source that is used for these three kinds of operations.

Disclosed disc record machine (disk drive) part has solved the problem that needs three motors in Japanese Utility Model communique 3-49682.This disc record machine to two, that is to say the decreased number of the motor that needs, and drives load/unload, chuck and the driving read head that independent loading motor is used to coil on forward and inverse direction.

According to the disk drive of relevant prior art generally include a housing, basically with the chassis of housing one, be fixed on turntable and drive motor on the chassis.That is to say that because the position of turntable is fixed, vertically displacement disc comes the load/unload dish, so that avoid influencing turntable.In addition, clamp device (chuck) must vertically be driven, so that dish is clipped on the turntable.

Therefore, in the disk drive of a routine, on the dish fixed surface of carriage, be provided with a dish fixator that is used for the lifting dish.So the dish fixator causes obstruction so that avoid along with moving up and down of carriage rotated between dish and turntable during the dish load/unload.Chuck is supported by the card arm on the fixing chassis, makes chuck turn and vertical moving.This chuck rotates up and down according to the sequential of dish load/unload, so that be clipped in dish on the turntable or take off dish.Therefore, activation configuration and executive component part are very complicated, are unfavorable for simplifying activation configuration and realize the good stable operation.

In addition, on this conventional disk drive, all driver parts except carriage also are arranged on the fixing chassis with relevant drive system.In addition, these parts rigidity are installed or are supported on the fixing chassis.The result is, to any impact of the disc record machine that exposes, shake or shake and will be all be directly delivered on the driver part that various rigidity install from fixing chassis.Therefore, these parts are easy to be subjected to very big infringement.Therefore, this design is unfavorable for improving the durability of disk drive to the external force influence, promptly is unfavorable for resisting vibrations and shaking.

These element rigidity are installed in also to make on the fixing chassis and extremely accurately locate these relative positions and necessitate.Therefore, require in the manufacturing of all parts and assembling, to keep high precision.When considering that needs are produced these elements in enormous quantities, require the necessity of very high degree of precision to be unfavorable for boosting productivity.

Consider these problems of relevant prior art, therefore, matrix purpose of the present invention provides a kind of CD drive, the number of motor capable of reducing using, simple in structure, durability and opposing vibrations and the ability of shaking strengthen, and have improved the throughput rate of producing in enormous quantities.

In order to achieve this end, CD drive according to a first aspect of the invention has a turntable, is used for supporting CD rotationally; An optical pickup is used for data-signal is written in the CD that rotates on the turntable, perhaps the data-signal of playback record on CD; The read head driving mechanism is used for two-way mobile optical pickup between interior all sides of CD and outer circumferential side; And a disk holder, be used for two-way moving CD between the primary importance and the second place, at the primary importance place, CD is on turntable, and at second place place, CD is in the outside of disk drive, this CD drive comprises: one first base plate, and it comprises the under(-)chassis of disk drive; And second base plate, it separates with first base plate.Second backplanes support can vertically move or swing with respect to first base plate on first base plate, and is provided with turntable and drives first motor that turntable rotates, and optical pickup and read head driving mechanism.Be arranged on and on first and/or second base plate be: load driving mechanism, be used to drive described disk holder; Can be on both forward and reverse directions driven second motor, be used for providing driving force to loading driving mechanism and read head driving mechanism; And driving force bang path switching mechanism, be used for arriving the driving force bang path that switches second motor between the path of read head driving mechanism to path of loading driving mechanism and transmission power in transmission power.Therefore, by continuous drive second motor on the first direction that rotates, can carry out following operation successively basically continuously: mobile optical pickup, rising or reduction turntable and moving CD; By going up continuous drive second motor in the opposite direction, can carry out these operations in the opposite direction basically continuously by opposite order with the first party of rotating.

Therefore, the second independent backplanes support makes second base plate vertically to move or swing in a circular path with respect to first base plate on first base plate.An independent motor (above-mentioned second motor) also can be on direction (first direction of rotation) or in the opposite direction by continuous drive, so that mobile continuously basically successively optical pickup, rising or reduction turntable and moving CD perhaps carry out these operations in the opposite direction basically continuously by opposite order.

In CD drive according to a second aspect of the invention, second base plate is arranged on the inside of the opening in first base plate, and is so supported, and makes second base plate to swing vertically with respect to first base plate around the one end; First base plate comprises a near cam gear the other end sidepiece that is arranged on second base plate, and described cam gear has cam track on its outer surface, is used to raise and reduces the other end of second base plate; Load driving mechanism and have a loading drive gear set, it comprises a plurality of gears that comprise final output gear.The engagement of the final output gear of described loading drive gear set and the outer toothed portion of cam gear with the rotating cam device, raises thus or reduces the opposite side of described second base plate.

In this CD drive on the one hand according to the present invention, cam gear is by rotating from loading the next driving force of drive gear set transmission, and the other end sidepiece of second base plate is raised along with the rotation of cam gear or reduces.The result is that second base plate swings up and down with respect to one distolateral that is hinged on second base plate first base plate on every side.

In the CD drive according to third aspect present invention, the profile of the outer rotor of the cam gear seen in longitudinal cross-section part is camber line or the straight line that approaches described camber line.This camber line is along vertical circular paths of motion, and the final output gear of loading drive gear set is along with the oscillating motion of second base plate moves along this path.

In this case, when final output gear swings up and down along with the oscillating motion of second base plate, load the final output gear of drive gear set and the outer rotor of cam gear and partly mesh.

In the CD drive according to fourth aspect present invention, an outshot is arranged on the other end sidepiece of described second base plate, because the cam track in this outshot engagement with cams device, the other end sidepiece of this second base plate is vertically located.

In this CD drive, the other end sidepiece of second base plate is determined by the engagement of this boss and cam track reliably with respect to the vertical location of first base plate.

In the CD drive according to fifth aspect present invention, disk holder comprises a carriage drive gear that is used for driven bracket, is placed with a dish on this carriage.When second base plate swings to an ad-hoc location downwards with respect to first base plate, the outer rotor of cam gear part and carriage drive gearing mesh.

In this CD drive, swing to downwards behind the first base plate certain position at second base plate, carriage is driven.

In the CD drive according to sixth aspect present invention, the read head driving mechanism comprises a feed rack that is used for mobile optical pickup, and a rack drives gear set that comprises a plurality of gears that is used to drive feed rack.

Behind the inner periphery position that optical pickup is moved to optical disc data signal record zone, feed rack can be moved to from interior all sides of CD specific location far away.Mesh by moving in this specific location of interior all sides and with driving force bang path switching mechanism, the second motor-driven power bang path switches to transmission power to the path of loading driving mechanism from the path to the read head driving mechanism.By from move to the outer circumferential side of dish at the described ad-hoc location of interior all sides, break away from driving force bang path switching mechanism thus, the second motor-driven power bang path switches to the path of transmission power to the read head driving mechanism from transmission power to the path of loading driving mechanism.

In this CD drive, because behind the inner periphery position that optical pickup is moved to optical disc data signal record zone, feed rack is movable to this specific location at interior all sides place of dish, the second motor-driven power bang path can be automaticallyed switch, and can switch once more when this specific location is shifted to the outer circumferential side of dish when feed rack.

In CD drive according to seventh aspect present invention, be arranged on second base plate to the telescopic adjuster bar of other end sidepiece, the locating slot that can be engaged by this adjuster bar is arranged in first base plate.When feed rack when a distolateral portion of second base plate moves to other end sidepiece and arrives an ad-hoc location, feed rack and adjuster bar engagement.When feed rack is further shifted to other end sidepiece after meshing with adjuster bar, adjuster bar protrudes and enters described locating slot from the other end sidepiece of second base plate, locatees with respect to first base plate at second base plate that makes in a lateral direction perpendicular to the feed rack traffic direction thus.

In this CD drive, because feed rack moves the ad-hoc location that exceeds other end sidepiece, adjuster bar is driven from the other end sidepiece of second base plate and protrudes.So adjuster bar enters the locating slot in first base plate, on perpendicular to the direction of feed rack traffic direction, determine the lateral attitude of second base plate thus with respect to first base plate.

In the CD drive according to eighth aspect present invention, cam gear comprises a unci that protrudes into the outside, and second base plate comprises a crooked road that is parallel to the cam gear Outboard Sections in its surface.Unci and the engagement of this bending road are located second base plate with respect to first base plate on the feed rack traffic direction.

Because the hook-shaped part of cam gear and this bending road engagement, second base plate is located with respect to first base plate on the feed rack traffic direction.

In CD drive according to ninth aspect present invention, elastic buffer unit be arranged on one be used for described one distolateral portion of second base plate is supported on the support component on first base plate and one be used for cam gear is supported on support component on first base plate.So second base plate is supported on first base plate in the elastic range of this buffer unit with afloat.

Therefore, second base plate is not to be supported on rigidly on first base plate, but is supported on first base plate in the determined limit of the elasticity of buffer unit showyly.

By below in conjunction with the accompanying drawing description of this invention, along with complete understanding of the present invention, other purpose of the present invention and achievement will become clearer.

Fig. 1 is the overall perspective view of the CD drive that most preferred embodiment assembles according to the present invention;

Fig. 2 is the parts explosion of the disk drive shown in Fig. 1;

Fig. 3 and Fig. 4 are the zoomed-in views of part shown in Figure 2;

Fig. 5 is the transverse bottom plate of the CD drive shown in Fig. 1 and the planimetric map that drives base plate;

Fig. 6 illustrates transverse bottom plate is fixed to the local side cross-sectional, view that drives an exemplary support structure on the base plate;

Fig. 7 illustrates transverse bottom plate to be tilted to the typical local side cross-sectional, view that drives base plate;

Fig. 8 is the amplification vertical section figure that is fixed on the floating bush on the transverse bottom plate;

Fig. 9 to Figure 13 is the planimetric map that the driving mechanism operation in the CD drive shown in Fig. 1 is shown successively;

Figure 14 to Figure 18 is the amplification view that the driving force bang path blocked operation of the driving mechanism in the CD drive shown in Fig. 1 is shown successively;

Figure 19 is the amplification view that carriage and carriage drive gear meshing are shown;

Figure 20 is the planimetric map that carriage is kept at the CD drive of internal drive;

Figure 21 is the planimetric map that carriage moves on to the CD drive of driver outside;

Figure 22 is the amplification view that the disc clamping mechanism of CD drive is shown;

Figure 23 is the sectional view along the line Y23-Y23 among Figure 22;

Figure 24 is the planimetric map of the cam gear of this driving mechanism;

Figure 25 is the side cross-sectional, view along the line Y25-Y25 among Figure 24;

Figure 26 is the side cross-sectional, view along the line Y26-Y26 among Figure 24;

Figure 27 is the side cross-sectional, view along the line Y27-Y27 among Figure 24;

Figure 28 is the side cross-sectional, view along the line Y28-Y28 among Figure 24;

Figure 29 is the local vertical section figure that the profile of cam gear is shown;

Figure 30 is the planimetric map of the feed rack of driving mechanism;

Figure 31 is the side cross-sectional, view along the feed rack of the line Y31-Y31 among Figure 30;

Figure 32 is the rear view of feed rack;

Figure 33 is the sectional view along the feed rack of the line Y33-Y33 among Figure 30;

Figure 34 is the sectional view along the feed rack of the line Y34-Y34 among Figure 30;

Figure 35 is the sectional view along the frizzen of the line Y35-Y35 among Figure 36;

Figure 36 is the planimetric map of the frizzen of driving mechanism;

Figure 37 is the vertical section figure along the frizzen of the line Y37-Y37 among Figure 36;

Figure 38 is the planimetric map of the rocking bar of driving mechanism;

Figure 39 is the side view along the rocking bar of the line Y39-Y39 among Figure 38;

Figure 40 is the side view along the rocking bar of the line Y40-Y40 among Figure 38;

Figure 41 is the side view along the rocking bar of the line Y41-Y41 among Figure 42;

Figure 42 is the planimetric map of the rocking bar of driving mechanism;

Figure 43 is the side view along the rocking bar of the line Y43-Y43 among Figure 42.

Most preferred embodiment of the present invention is described below with reference to accompanying drawings.Fig. 1 is the overall perspective view of the CD drive that most preferred embodiment assembles according to the present invention.Fig. 2 is the parts explosion of the disk drive shown in Fig. 1, and Fig. 3 and Fig. 4 are the zoomed-in views of part shown in Figure 2.

Should be noted that in whole instructions, CD drive, disk drive and driver are synonyms.

From these figure as can be seen, the CD drive 1 of a most preferred embodiment comprises that one drives base plate 10 and a transverse bottom plate 20 according to the present invention, drive the installation base plate of base plate 10 as the critical part of driver 1, transverse bottom plate 20 is as the supporting baseplate of the critical part of the driving mechanism of supporting disk driver.

When overlooking, the whole shape that drives base plate 10 is a foursquare basically framework.Transverse bottom plate 20 is mounted among the inner space 10H that drives base plate 10.

Should be noted that driving base plate 10 and transverse bottom plate 20 are respectively corresponding to first base plate in the claims of enclosing and second base plate.

Dish as data storage medium such as compact disc (CD), is placed in the carriage 55 of this disk drive 1.Carriage 55 is along the two-way dish of putting thereon that transports of framework that drives base plate 10.As Fig. 1 and seen in fig. 2, the path of carriage 55 is oblique lines, and points out with the arrow among Fig. 2.So when from the inside taking-up dish of disk drive 1, promptly At time of eject runs to the left side under carriage 55 is oblique as depicted in figs. 1 and 2.And when dish was put in the disk drive 1 from the outside, when promptly inserting, carriage 55 ran to the right side as depicted in figs. 1 and 2 obliquely.

It should be noted that, by after the sidepiece (the oblique left side down Fig. 1 and Fig. 2) of the disk drive 1 of the inside taking-up dish (also being carriage 55) of disk drive 1, being called as the front side of driver 1 herein, be called as the rear side of driver 1 after the sidepiece (right side obliquely among Fig. 1 and Fig. 2) of the disk drive 1 by the Insert Here dish.Upper and lower as Fig. 1 and driver 1 seen in fig. 2 is also referred to as upside and downside later on.

The a pair of right side and left transverse bottom plate pillar 11 vertically are arranged on the rear portion that drives base plate 10, i.e. upper right side among Fig. 1 and Fig. 2.Each back corner place in transverse bottom plate 20 is formed with a notch 21.An elasticity (being generally rubber) lining 29 (floating bushes) are installed in each notch 21.By these linings 29 are installed on the above-mentioned transverse bottom plate pillar 11, the rear portion of transverse bottom plate 20 is so supported, make it can in the vertical direction be hinged on and drive on the base plate 10, hinged center between the most advanced and sophisticated center of right and left transverse bottom plate pillar 11 horizontal linear Lh (see figure 5) on.

The rear portion of transverse bottom plate 20 is also so supported by right and left lining 29, makes transverse bottom plate 20 to float in specific scope with respect to driving base plate 10.This scope can be determined by the elasticity of lining 29.Should be noted that right and left lining 29 are not shown among Fig. 5, so that can be clear that transverse bottom plate pillar 11 and notch 21.

Then describe these linings 29 in detail with reference to Fig. 8.Lining 29 is molded whole ducted bodies, end sealing, other end opening.Each lining 29 also has first and second bigger buffer portion 29a and the 29b of diameter that distribute successively along the major axis of lining 29, and the less fixed part 29c (first fixed part) of the diameter between two buffer portions.

This first fixed part 29c forms a narrow neck thus between buffer portion 29a and 29b, and is the part that is fixed to transverse bottom plate 20, and transverse bottom plate 20 is as first parts that supported by floating bush 29 with afloat.More particularly, in the hole part that the periphery of the first fixed part 29c is installed in the lining mounting flange 21b in the notch 21, can be installed in lining 29 in the notch 21 in the back corner of transverse bottom plate 20.

The second fixed part 29d that is used to seal the cavity of floating bush 29 inside is integrally formed in the end side of the first buffer portion 29a.This second fixed part 29d is fixed to the part that drives base plate 10, and driving base plate 10 is second parts that floated and supported by lining 29.More particularly, this second fixed part 29d is fixed on the terminal 11d of transverse bottom plate pillar 11.

The end side of the second buffer portion 29b is an opening.Transverse bottom plate pillar 11 is inserted in the floating bush 29 by this opening.The end portion of the second buffer portion 29b contacts with the lining stayed surface 10f that drives base plate 10.

Best, the rear portion of transverse bottom plate 20 is assemblied in by lining 29 by this way and drives on the base plate 10, and the lining stayed surface 10f that has certain elasticity when promptly the end portion of the second buffer portion 29b is with normal condition contacts.Normal condition as used herein is a kind of like this state, and promptly transverse bottom plate 20 and parts mounted thereto only act on the lining 29 with normal weight.

When driver 1 uses or during making, when vibrations are applied on the disk drive 1, the power that applies thus causes relative motion driving between base plate 10 and the transverse bottom plate 20, follows rear portion that the buffer action of the compression deformation in the second buffer portion 29b elastic limit can the absorb transverse bottom plate 20 effectively vibrations component of (promptly at lining mounting flange 21b to the direction of lining stayed surface 10f) motion downwards.

Should be noted that under normal condition the dispensable acquisition of contact between the end of the second buffer portion 29b and the lining stayed surface 10f comes from the condition precedent of the vibrations buffering effect of the second buffer portion 29b.Gap between this end and the lining stayed surface 10f can be reduced the vibrations buffering effect of the size that is equivalent to this gap simply, and when the relative motion between driving base plate 10 and the transverse bottom plate 20 surpassed this gap, the vibrations buffering effect was equivalent to this relative motion and how much has surpassed this gap.

When the rear portion of transverse bottom plate 20 moves downward, lining mounting flange 21b removes from the terminal 11d of transverse bottom plate pillar 11, the top of the second fixed part 29d is suspended on the terminal 11d of transverse bottom plate pillar 11, and the first buffer portion 29a stretches in its elastic limit and is out of shape.

Therefore, vibrations both can be absorbed by the buffering effect of the extensional deformation of the first buffer portion 29a, can be absorbed by the buffering effect of the compression deformation of the second buffer portion 29b again.Therefore can obtain fabulous damping effect.

The second fixed part 29d is a part that is generally the floating bush 29 of rubber, so elasticity is fine.Like this, when driving the power that causes relative motion between base plate 10 and the transverse bottom plate 20 and apply, the elasticity of the second fixed part 29d can further be improved damping effect and noise suppression effect.

Should be noted that the second fixed part 29d that can form floating bush 29 like this, promptly it not exclusively seals an end (top) of the inner chamber of floating bush 29.More particularly, the second fixed part 29d can have an opening, and when applying the power of a lifting transverse bottom plate pillar 11 to opening, the terminal 11d of transverse bottom plate pillar 11 is not exclusively by described opening.

The rear portion that can absorb transverse bottom plate 20 effectively by the buffering effect of following the compression deformation in the first buffer portion 29a elastic limit upwards (also promptly, makes on the direction of terminal 11d of lining mounting flange 21b shift-in transverse bottom plate pillar 11) the vibrations component of motion.

By the transversely deforming of floating bush 29 in its elastic limit, can absorb the transverse vibration component that is parallel to backplate surface, such as at the fore-and-aft direction of transverse bottom plate 20 or the vibrations component on the left and right directions.

The terminal 11d of transverse bottom plate pillar 11 preferably forms like this, and promptly from vertical section figure, the shape of outer ledge is a circular portion.In this case, the shape of the inside edge of the second fixed part 29d of floating bush 29 finding from the vertical section figure also is a circular portion.

When such formation, the second fixed part 29d (whole floating bush 29 also promptly) can be around center C 11 circular motion of transverse bottom plate pillar 11.When transverse bottom plate 20 when driving base plate 10 and rotate up or down, the motion Lh (see figure 5) of axle is the straight line of the center C 11 of a terminal 11d who connects right and left transverse bottom plate pillar 11.

And best, between the periphery of the terminal 11d of the interior week of the second fixed part 29d and transverse bottom plate pillar 11, a specific gap is arranged, on the second fixed part 29d, form a plurality of protruding 29e.These protruding 29e are directly towards the center in interior week of the second fixed part 29d, and when transverse bottom plate pillar 11 is installed in the floating bush 29, aim at the center of post tips 11d.

Also promptly, the second fixed part 29d of floating bush 29 is installed on the terminal 11d of transverse bottom plate pillar 11 by the protruding 29e that gets involved, so, between the second fixed part 29d and terminal 11d, keep a specific gap.As a result, but second fixed part 29d dead smooth ground circular motion on the end of transverse bottom plate pillar 11.

Therefore, floating bush 29 can comprise first and second buffer portion 29a and the 29b, and first and second fixed part 29c and the 29d.So can provide one simple, save the space, floating installation cheaply, this floating installation can support the whole weight of transverse bottom plate 20, and effectively absorbing vibration prevents that simultaneously transverse bottom plate 20 vertically skids off its position when transverse bottom plate 20 vibrations.

In addition,, can guarantee the accurate center of a circular motion, the center of another circular motion needn't be set by the center of rotatable parts is set.

Can find out also that from Fig. 4 and Fig. 5 the forward edge of the inner space 10H in driving base plate 10 partly locates to be formed with a recess 12, the shape of the girth of this recess 12 is circular.Axle 12s vertically is arranged in the bottom centre of this recess 12.Basically become the central boss 31 of columniform cam gear 30 to be installed like this, promptly it can freely rotate on this axle 12s.Helical spring (floating spring) 39 is arranged on the bottom of this cam gear 30 and drives between the bottom of the recess 12 in the base plate 10.The central boss 31 of cam gear 30 is by axle 12s, and holding screw 37 is screwed into the end of axle 12s by the elasticity axle collar (axle collar floats) 38.

Therefore, cam gear 30 is installed in the recess 12 that drives base plate 10, and its top and bottom are fixed between

elastomeric element

38 and 39, that is, the bottom support of cam gear 30 is on helical spring 39, and its top is fixed by the unsteady axle collar 38.As a result, cam gear 30 is supported on by this way and drives on the base plate 10, can make cam gear 30 (promptly in the elastic limit of the axle collar 38 and floating spring 39 of floating) float (being in afloat) in specific limit.

Should be noted that the above-mentioned unsteady axle collar 38, floating spring 39 and the right side and left floating bush 29 are corresponding to the buffer unit in the claim of enclosing.

Should notice further that the floating bush 29 and the unsteady axle collar 38 will be not limited to elastomeric material.For example, also replaceable use has barras or other suitable materials of certain elasticity.

Describe cam gear 30 in detail with reference to Figure 24 to Figure 29 below.This cam gear 30 comprises a plurality of tooth (external tooth) 30g that are parallel to the longitudinal axis L g of this cam gear 30 on its outer surface, and a cam track 33, and this cam track 33 has top and bottom

water level line

33a and 33c, and chute 33b.

On the outside surface of cam gear 30, also has a smooth 34 that does not have tooth 30g.A forward edge (referring to Fig. 2 and Fig. 3) that is used for also being arranged on transverse bottom plate 20 with the outshot 20P of cam track 33 slip engagements.This outshot 20P is by driving the cam gear 30 and the front portion of cam track 33 engagements with support transverse bottom plate 20 on the base plate 10.

As shown in Figure 6 and Figure 7, the rear portion of transverse bottom plate 20 is supported by lining 29, and its front portion is supported by the cam gear 30 that is supported on the float axle collar 38 and the floating spring 39, makes it float in specific limit and is driving on the base plate 10.Should be noted that these limits are definite by the elasticity of floating bush 29, the float axle collar 38 and floating spring 39.

Therefore, this transverse bottom plate 20 is not to resemble that rigid support is driving on the base plate 10 the relevant disk drive of the prior art, but support like this, promptly it can float in the elastic range that supports buffer unit (being floating bush 29, the unsteady axle collar 38 and floating spring 39) and drive on the base plate 10.Therefore,

buffer unit

29,38 and 39 can absorb the impact that is applied on the disk drive 1, shakes or shake, thereby prevents that impulsive force or shaking force directly are delivered on the retaining element on the transverse bottom plate 20 from driving base plate 10.As a result, disk drive 1 has improved durability and shock resistance and anti-vibration resistance.

In addition, make it in the elastic range of

buffer unit

29,38 and 39, float on driving base plate 10, just can in the showy scope of transverse bottom plate 20, regulate the relative positions that drives on base plate 10 and the transverse bottom plate 20 by supporting transverse bottom plate 20.Compare with the conventional disk drive of element rigid support, lower according to the part manufacturing and the assembly precision requirement of disk drive of the present invention, therefore can in manufacture process, boost productivity.

As shown in Fig. 2 and Fig. 3, first and

second motors

3 and 4 and comprise that a circuit board 2 that is used for the control circuit of controlling and driving

motor

3 and 4 is installed in the bottom that drives base plate 10.

The turntable 5 that its top is placed with a dish 9 (seeing Fig. 5 to Fig. 7) also is arranged on the driving base plate 10.This turntable 5 links to each other with the output shaft 3s (see figure 3) of first motor 3 (spindle motor).Be used for writing data-signal on 9 or optical pickup 6 and other driving elements that are used for operation board driver 1 of the data-signal of playback record also are arranged on the top that drives base plate 10 from it at dish.

Below these driving mechanisms will be described.

As Fig. 3 and shown in Figure 5, front and back (up and down) opening 20H is arranged on the transverse bottom plate 20.The a pair of read

head gathering sill

22 and 23 that is used for the operation of direct light read head 6 front and back is arranged on the sidepiece of this opening 20H.Turntable 5 preferably be positioned at read

head gathering sill

22 and 23 and the front end of opening 20H near, perhaps even in the front of this position.

Optical pickup 6 is so supported, promptly it can by with read

head gathering sill

22 and 23 in the right side and left leg 6f engagement and on transverse bottom plate 20 before and after slide.Should be noted that the flexible connecting device such as flexible flat cable that is used to connect optical pickup 6 and circuit board 2 passes this opening 20H.

A track segment (guide rail) 24 is parallel to gathering sill and extends, and one the next door that it is arranged in read

head gathering sill

22 and 23 is used for rack member (feed rack) 40 and guide rail 24 engagements along guide rail 24 longitudinal sliding motions.Should be noted that in Fig. 3 and Fig. 5, guide rail 24 is arranged on the right side on gathering sill 23 next doors.

One end of optical pickup 6 (Fig. 3 with Fig. 5 in right-hand member) links to each other with feed rack 40 by screw 49 (see figure 3)s.As a result, by along guide rail 24 sliding feed tooth bars 40, optical pickup 6 can be under the guiding of read

head gathering sill

22 and 23 two-way moving forward and backward.

Shown in detailed among Figure 30-34, tooth (driven rack member) 41 is gone up whole length along feed rack 40 1 sides (right side among Fig. 3 and Fig. 5) basically and is formed.One section tooth 42 (bang path switching tooth bar) also is formed on the opposite side of feed rack 40 front portions.

It should be noted that, arm 40f and the read head gathering sill 23 outstanding from the rear portion of feed rack 40 mesh, and when feed rack 40 ran to rear portion (among Fig. 5 top), this arm 40f was by percussion and be stopped on the rear wall of read head gathering sill 23 and limit the motion of feed rack 40 to the rear portion.

The gear set 51 (rack drives gear set) that comprises one group of gear is arranged on the transverse bottom plate 20 driving feed rack 40, and the two-way mobile optical pickup 6 in front and back.

As Fig. 9-13 in detail shown in, this gear set 51 comprises: the motor gear 4G on output shaft 4s who is fixed on second motor 4; One first transverse gear 52, it has a major diameter with motor gear 4G engagement and imports gear (first laterally imports gear) 52A and a minor diameter output gear 52B (the first horizontal output gear) who is wholely set on the top of input gear 52A; And one second transverse gear 53, it has a major diameter with the first horizontal output gear 52B engagement and imports gear (second laterally imports gear) 53A and a minor diameter output gear 53B (the second horizontal output gear) who is wholely set on the bottom of the second horizontal input gear 53A.The section of rack 41 that is driven of the second horizontal output gear 53B and feed rack 40 meshes.

When second motor 4 is driven, motor gear 4G is rotating such as the counter clockwise direction shown in Fig. 9-13 (first direction of the rotation in the claim of enclosing corresponding to the present invention) with specific speed, reduce motor rotation speed with specific reduction gear ratio, and be delivered to output terminal by gear set 51, make final output gear (the second horizontal output gear) 53B rotate counterclockwise with the speed that reduces.

This make feed rack 40 with predetermined speed along guide rail 24 (bottom in Fig. 9-13) operation forward.When second motor 4 with above-mentioned opposite direction on when being driven, feed rack 40 also moves in the opposite direction.

Therefore, operate the traffic direction that can change feed rack 40 and optical pickup 6 by the both forward and reverse directions that switches second motor 4, therefore, feed rack 40 and optical pickup 6 can be driven by two-way front and back.

Feed rack 40 and gear set 51 form basic optical pickup driving mechanism, the optical pickup driving mechanism in the claim that is equivalent to enclose, and thus, optical pickup 6 moves on the both direction between the inner periphery and the outer periphery of dish 9.Read

head gathering sill

22 and 23 and guide rail 24 also help to drive optical pickup 6.

A carriage drive gear 56 is arranged on the front portion that drives base plate 10, it is used for movable support bracket 55 between unloading position and " loaded " position, unloading position is in the front of disk drive 1, can put into carriage 55 to dish or take off from it, " loaded " position is in the inside of disk drive 1, in this position, dish is loaded into turntable 5 or unloads from it.

Should be noted that the primary importance second place in the claim that this unloading position and " loaded " position be equivalent to respectively enclose.

This carriage drive gear 56 comprises that one is used for and the major diameter output gear 56B that is arranged on rack bracket tooth 55g (the seeing Figure 19-21) engagement on the rear portion of carriage 55 and the minor diameter input gear 56A below output gear 56B.Carriage drive gear 56 is positioned at the next door of cam gear 30, makes the external tooth 30g of input gear 56A and cam gear 30 mesh.

Carriage 55, rack bracket tooth 55g and carriage drive gear 56 form disk holder, disk holder in the claim that is equivalent to enclose is used for transporting dish 9 between the unloading position (second place) of turntable 5 " loaded " position (primary importance) and disk drive 1 outside.

The loading drive gear set 61 (seeing Fig. 9-13) that is used for movable support bracket 55 between dish 9 unloading positions and " loaded " position is arranged on the top of transverse bottom plate 20.

This loading drive gear set 61 comprises: be fixed on the motor gear 4G on the output shaft 4s of second motor 4; One first loading gear 62, it has, and a major diameter first with motor gear 4G engagement is loaded input gear 62A and a minor diameter first that is wholely set on the top of the first loading input gear 62A loads output gear 62B; One second loading gear 63, it has one and the first major diameter second loading input gear 63A and minor diameter second that is wholely set on the top of the second loading input gear 63A that loads output gear 62B engagement and loads output gear 63B; And major diameter the 3rd loading gear 64 that meshes with the second loading output gear 63B.The 3rd loading gear 64 meshes with the tooth 30g of cam gear 30.

When on vertical section, seeing, perhaps be preferably in when seeing on the side view shown in Figure 29, the profile of the tooth 30g of cam gear 30 is a curved surface.When being installed into, transverse bottom plate 20 and cam gear 30 drive in the base plate 10, transverse bottom plate 20 is hinged on and drives base plate 10 rear part edges, so that when moving up and down with respect to driving base plate 10 circumference (seeing Fig. 6 and Fig. 7), the curved surface of profile is the part along with the camber line Cg ' of the circumferential path Cg of the forward edge of the 3rd loading gear 64.

Therefore, even transverse bottom plate 20 has swung to and driven base plate 10 position (shown in the dotted line and Fig. 7 among Figure 29) at angle, the 3rd loading gear 64 on the transverse bottom plate 20 and the tooth 30g of cam gear 30 can mesh reliably and smoothly.The profile that should be noted that tooth 30g in vertical section is one and favours the major axis of cam gear 30 and the straight line of approximating curve Cg '.

Shall also be noted that second loading gear 63 is not shown in Fig. 6 and Fig. 7, so that clearly show that the 3rd loading gear 64 with the tooth 30g of cam gear 30 engagement.

As mentioned above, profile in the vertical section of the tooth 30g of cam gear 30 is a camber line along with the circular path of the 3rd loading gear 64 (promptly loading the final output gear of drive gear set 61), when gear 64 when circle moves up and down along with the circus movement of transverse bottom plate 20, itself or be a straight line that approaches this camber line.The result is, though load drive gear set 61 along with the circular path motion of transverse bottom plate 20 along the circular path vertical motion, final output gear 64 reliably and smoothly with the tooth 30g engagement of cam gear 30.

Should be noted that the loading driving mechanism that is used for the driving-disc loader mechanism consists essentially of loading drive gear set 61 and cam gear 30 (tooth 30g perhaps more specifically says so), this loading driving mechanism is corresponding to the loading driving mechanism in the claim of enclosing.

Above-mentioned optical pickup 6 is movable to the specific location on interior all sides of dish 9 data-signal posting field.Then, when optical pickup 6 by the driving force of second motor 4 through gear set 51 from coil 9 interior week move by side to outer circumferential side, and during the outer described specific location of the data-signal posting field of arrival dish 9, the driving force bang path of second motor 4 is switched to and loads drive gear set 61.

With reference to Figure 14-16 this bang path blocked operation is described in further detail below.A vertical double-screw bolt 20s is arranged on the front portion of transverse bottom plate 20.The frizzen 71 that is used to switch the driving force bang path is fixed on double-screw bolt 20s.Near the rocking bar 73 of the position of restriction frizzen 71 is arranged on.

As among Figure 35-37 in detail shown in, frizzen 71 comprises that one is rotatably mounted to pedestal 71b on the double-screw bolt 20s, is formed on local gear 71g and a pair of meshing arm 71a that meshes with cam gear 30 on the part of the pedestal 71b outside.The stops 71s that is used to mesh the claw 73d of rocking bar 73 is arranged on the outside of frizzen pedestal 71b.

Local gear 71g is used for the engagement force bang path and switches tooth bar 42.Meshing arm 71a is configured to make it and unci 32 engagements of protruding from the outside of cam gear 30.

As among Figure 38-40 in detail shown in, rocking bar 73 comprises that a pedestal 73b who is mounted and fixed on the front portion of transverse bottom plate 20, one become bar part 73a that L shaped shape extends from pedestal 73b and one the spring section 73c that extends from pedestal 73b of camber basically basically.The claw 73d of a stops 71s who is used to mesh frizzen 71 and the pin 73p that projects upwards are Unitarily molded at bar part 73a.Gathering sill 73s also is formed on the pedestal 73b, and by this gathering sill 73b, the adjuster bar 75s of backstay 75 is free to slide.

From Figure 30 and Figure 32 as can be seen, become the cam track 43 of curve form to be arranged in the rear portion of feed rack 40 when from vertical view, seeing.The front opening of cam track 43 is in the front portion of feed rack 40.So the pin 73p of rocking bar 73 can and be free to slide by these cam track 43 engagements.

The detent mechanism that is used for accurately keeping being arranged on the engagement that drives the various elements on base plate 10 and the transverse bottom plate 20 also is arranged on driving base plate 10 and transverse bottom plate 20.

More particularly, be used for about location transverse bottom plate 20 and the positioning element 75 (backstay) that drives the position of base plate 10 be arranged on 20 the front portion of riding roughshod.Shown in Figure 41-43 was detailed, this backstay 75 comprised an engages base 75b, was used for meshing in the front and back gathering sill 26 of transverse bottom plate 20 bottom formation and freely switching slip; From the outstanding forward extension 75c of engages base 75b; And the adjuster bar 75s that (shown in Figure 14-18 about) extends before and after the position of departing from engages base 75b and extension 75c the right.

As mentioned above, this adjuster bar 75s is inserted among the gathering sill 73s (75s, sic) that forms among the pedestal 73b of rocking bar 73 and can be free to slide front and back.As hereinafter describing more comprehensively, after the assembling, the front portion of extension 75c contacts with the spring section 73c of rocking bar 73, and is pulled to the rear portion thus.The rear portion of extension 75c also can contact with the front portion of feed rack 40, and when moving to the front portion with convenient feed rack 40, whole backstay 75 also moves to the front portion.

Shown in Figure 14-18, locating slot 13 is arranged in the front bulkhead of the inner space 10H that drives base plate 10, and the adjuster bar 75s of backstay 75 can enter and be fixed therein.When feed rack 40 moved a specific range that is distal to the front portion, the front portion of feed rack 40 and the rear portion that contacts and promote the extension 75c of backstay 75 were advanced whole backstay 75, and its engages base 75b is along with gathering sill 26.This makes adjuster bar 75s be installed in the locating slot 13 that drives base plate 10, thereby locatees transverse bottom plate 20 accurately and drive base plate 10.

See in the vertical view that shape becomes the cam track 27 of camber line also to be arranged on the top of the front portion of transverse bottom plate 20.Engagement outshot 32p is arranged on the rear portion of the unci 32 on the cam gear 30.This engagement outshot 32p and cam track 27 engagements are regulated thus and are ridden roughshod 20 with respect to the front and back position that drives base plate 10.

Transverse bottom plate 20 anterior and the vertical location that drives between the base plate 10 are also accurately controlled by the outshot 20p that the cam track 33 of the front portion that is arranged on transverse bottom plate 20 and cam gear 30 meshes.

So, can be on three vertical direction (promptly, front and back and vertically) determine that accurately the front portion of transverse bottom plate 20 is with respect to the position that drives base plate 10.Be installed in transverse bottom plate 20 and drive on the base plate 10 element can be accurately and reliably with corresponding part engagement.Therefore, when the bang path of the driving force of switching second motor 4, can accurately keep driving being connected of loading driving mechanism on disk holder and the transverse bottom plate 20 on the base plate 10.

Disk drive 1 also has a clamping plate 95, and it has a clamper that assembles 96, is used for dish 9 is clamped in turntable 5 (seeing Fig. 1,2,4,22 and 23).This clamper 96 heart therein has a magnet 97, and the felt collar 98 that is fixed on the dish surface of contact on the bottom of this clamper 96.

Claw 95d is formed among a plurality of hold-down arm 95f (two front and rears that are arranged on this embodiment) one, and hold-down arm 95f is arranged on the right side and the left side of clamping plate 95.Can be assemblied in clamping plate 95 on the driving base plate 10 with the sidepiece engagement that drives base plate 10 by these claws of Dad 95d.Like this, drive on the base plate 10 by clamping plate 95 is assemblied in, the center of clamper 96 can be centered on the center of rotation of turntable 5.

Clamping plate 95 comprises and is used for that the right side and the left horizontal base 95b of hold-down arm 95f, the flush deck socket 95c that is used to support the annular center fixator 95a of clamper 96 and is used to be connected and fixed device 95a and pedestal 95b are supported in right side and left side thereon.

Notch 95e is formed on the pedestal and each side between the corresponding horizontal pedestal 95b of fixator 95a.The width of each flush deck socket 95c is less than the width of horizontal base 95b, and its sizableness is in notch 95e.This makes the ratio of rigidity horizontal base 95b of flush deck socket 95c little, makes flush deck socket 95c be easier to vertical bending.

When disk drive 1 drops,, make turntable 5 contact with clamping plate 95 such as making disk drive 1 stand very big vibrations, clamping plate 95 is easy to the in the vertical direction distortion, thereby therefore the absorption impulsive force, can prevent effectively that turntable 5 (with the spindle motor 3 that links to each other with turntable 5) is subjected to great damage.

To describe the operation of disk drive 1 below in detail.

When dish 9 is put in the disk drive 1, and be recorded in the signal of dish on 9 when reproducing by optical pickup 6 (see figure 9)s, the outshot 20p at the forward edge place by the transverse bottom plate 20 among the top water level line 33a that is fixed on the cam track 33 in the cam gear 30, transverse bottom plate 20 is arranged essentially parallel to and drives base plate 10, as shown in Figure 6.

The stops 71s of frizzen 71 and the claw 73d of rocking bar 73 engagement, unci 32 engagements of meshing arm 71a and cam gear 30, this moment is as shown in Figure 14.When such engagement, frizzen 71 rotates on the clockwise direction shown in Fig. 9 and Figure 14 always.

For in this position from coiling read output signal on 9, spindle motor 3 is driven, so that rotate the turntable 5 that dish 9 is housed on it with specific speed, optical pickup 6 moves to the position below the reproduced signal record road, and the optical element of optical pickup 6 (optical system that promptly comprises laser instrument and lens) is operated with from coiling 9 signals of reading needs.

If with reproduced signal record road not on current optical pickup 6 positions, if perhaps signal will read from a plurality of signal records road, optical pickup 6 must be by suitably to dish interior week of 9 front portion of disk drive 1 (promptly to) or coil 9 periphery (being the rear portion of disk drive 1) and move.

Move optical pickup 6 by the optical pickup driving mechanism.As mentioned above, drive second motor 4 and rotary electric machine gear 4G thus.The rotating speed of motor gear 4G reduces with specific speed reduction ratio and is delivered to output terminal by rack drives gear set 51, final output gear 53B (the second horizontal output gear) is rotated with the speed that reduces, and move forward and backward feed rack 40 and coupled optical pickup 6.If motor gear 4G is as counterclockwise rotating as shown in Fig. 9-13, optical pickup 6 moves to the interior Zhou Xiangqian of dish 9 (downward in Fig. 9-13).If motor gear 4G rotates in opposite direction, optical pickup 6 (makes progress) mobile in Fig. 9-13 to the periphery of dish 9 backward.

It should be noted that, loading drive gear set 61 also rotates along with the operation of second motor 4 during this signal reproduction pattern, but the tooth of the 3rd loading gear 64 (being the final output gear of gear set 61) is positioned in the partes glabra office of cam gear 30, therefore can not mesh with cam gear tooth 30g.So, under this signal reproduction pattern, can not be delivered to cam gear 30 from the driving force of second motor 4, and carriage drive gear 56.

Figure 10 and Figure 15 show when being positioned at and are used for the transmission of playback record at the signal of the interior circumferential portion of dish 9 record position scope (data-signal posting field).When being positioned at when this disk area reads, optical pickup 6 moves forward to the inner periphery Sr of dish 9 data-signal posting field by the optical pickup driving mechanism, and the final output gear 53B of the rear end of driven section of rack 41 of feed rack 40 and rack drives gear set 51 (the second horizontal output gear) meshes.The power bang path switches the also local gear 71g of extremely close frizzen 71 of tooth bar 42.

The data-signal posting field of CD 9 is learnt by the document of determining based on the distance at the separation disc center of coiling format standard.The disk drive of a routine also has an optical pickup position detector, it is arranged on the interior all positions corresponding to the data-signal posting field, so that whether detect optical pickup in this interior all position, perhaps move to herein, thereby can prevent to exceed this point to the too far away of the interior Zhou Yidong that coils.

Compare with the design of this routine, have all detector switches 7 in according to the disk drive 1 of this most preferred embodiment, it is arranged on the inner periphery Sr place of the data-signal posting field of dish 9, and use inner periphery Sr is as the inner periphery switching position.When all detector switches 7 cut out in this, as the CD drive of routine, all detector switches 7 detected optical pickups whether in interior all positions or moved to herein in this.Different with the disk drive of routine is, when interior all detector switches 7 were opened, in optical pickup 6 starts during all detector switches 7, it is unrestricted that optical pickup 6 exceeds the motion of inner periphery Sr, therefore, the interior week that is distal to dish 9 that optical pickup 6 can on purpose move.

Interior all detector switches 7 are with the mode mechanically actuated identical with common conventional sense device, and it is configured to and can stretches out from the top of transverse bottom plate 20 or regain.When the position above all detector switches 7 in optical pickup 6 arrival, the bottom influences switch 7 of optical pickup 6, the pressure of all detector switch 7 resistance switch spring (not shown)s is pushed into transverse bottom plate 20 in making.Should be noted that all detector switches 7 are not limited to above-mentioned mechanical hook-up in this, it can be replaced by contactless detecting device or any various other known design.

Fig. 1 and Figure 16 show optical pickup 6 after it has moved to inner periphery Sr, and all detector switches 7 in the operation in the interior week that is distal to dish 9 of moving then, exceed this position.

Different between Figure 10 and state shown in Figure 15 and Fig. 1 and the state shown in Figure 16 will be described below, and the moving of these states.

Behind interior all detector switches 7 of optical pickup 6 operation open modes, by continuing to drive second motor 4 with the same direction (being counter clockwise direction under this situation) with the state shown in Figure 10 and Figure 15, optical pickup 6 moves to the state shown in Figure 11 and Figure 16 from the state shown in Figure 10 and Figure 15.

Therefore, be distal to interior week by mobile optical pickup 6, the power bang path that moves forward and backward the feed rack 40 of optical pickup 6 switches the local gear 71g engagement of tooth bar 42 and frizzen 71, and clockwise direction is rotated frizzen 71.Thus, the unci 32 of the meshing arm 71a of frizzen 71 counter clockwise direction rotating cam device 30.

Therefore, cam gear 30 counterclockwise rotates, and cam gear tooth 30g begins and final output gear 64 (the 3rd loading gear) engagement of loading drive gear set 61.At this moment, driven section of rack 41 of feed rack 40 still with the final output gear 53B (the second horizontal output gear) of rack drives gear set 51 engagement.

Because rocker pins 73p follows hard on the cam track 43 of feed rack 40, with the stops 71s engagement of frizzen 71 with the location and fixedly the rocking bar 73 of frizzen 71 also rotate.The result is, the claw 73d frizzen 71 that got loose.

Figure 12 and Figure 17 show a kind of like this state, wherein cam gear 30 is by counterclockwise rotating from the driving force of the 3rd loading gear 64, thus, cam gear 30 beginnings and final output gear 64 (the 3rd loading gear) engagement of loading drive gear set 61.

This operation also can be rotated realization by the counter clockwise direction of the motor gear 4G of second motor 4 (promptly rotate with motor gear 4G and mobile optical pickup 6 to the same direction in interior week).

The operation clockwise direction of this cam gear 30 is rotated 71 to positions by cam gear 30 restrictions of frizzen, so, optical pickup 6 is moved to farther interior all position (forward facing position), up to driven section of rack 41 of feed rack 40 second horizontal output gear 53B that gets loose.The result is that the further counter clockwise direction of motor gear 4G is rotated, and is not delivered to feed rack 40 from the driving force of second motor 4, even optical pickup 6 moves.

At this moment, the pin 73p of rocking bar 73 is directed into the sloping portion of cam track 43 along the cam track 43 of feed rack 40, and is counterclockwise rotated by the spring force of rocking bar 73.Frizzen 71 continues clockwise direction and rotates, and is separated from cam gear 30 fully up to it.

It should be noted that, frizzen 71, rocking bar 73 and cam gear 30 (or the unci 32 and the smooth 34 of cam gear 30) more specifically, and the power bang path of feed rack 40 switches tooth bar 42 and cam track 43 more specifically, they are combined and have formed power bang path switching mechanism, are used to switch the bang path of the driving force of second motor 4.This power bang path switching mechanism is corresponding to the power bang path switching mechanism in the claim of enclosing.

As mentioned above, feed rack 40 can move to optical pickup 6 the inner periphery Sr position at interior all limits place of dish 9 data-signal posting field, can continue to move this optical pickup 6 then and exceed this position, the interior week of more close dish 9, in addition, this ad-hoc location at week place or shift to the periphery of dish, the driving force bang path of changeable second motor 4 in moving to by feed rack 40 from this ad-hoc location.The result is, the power that can be used as the signal read operation of optical pickup 6 and switch the driving force bang path of second motor 4 from the driving force of single motor (second motor 4).

In addition, after the inner periphery Sr of the data-signal posting field that optical pickup 6 is moved to dish 9 is used for signal reproduction, do not change the rotation direction of axle, by continuing to drive same motor 4, dish 9 is freed from turntable 5 automatically, makes dish 9 to eject from disk drive.Therefore, can remove the dish loading motor of the conventional needed special use of CD drive mid-game load/unload.Therefore, can reduce the cost of disk drive by the number that in this disk drive, reduces the motor that uses.

In addition, inner periphery Sr at the data-signal posting field that optical pickup 6 is moved to dish 9, and after the position of optical pickup 6 has been detected by interior all detector switches 7, direction of operating by changing second motor 4 or stop second motor 4 simply, just ejection tray 9 from disk drive not continues to read or write signal on same dish 9.

Also can reduce the detecting device that uses in the disk drive or the number of detector switch, a CD drive cheaply is provided thus, this be because, be put in the disk drive and as fruit tray and clamped as fruit tray, all detector switches 7 in can using, thus can remove the specific detectors that in the disk drive of routine, is used for these testing goals.

Can be designed on the rear end of base plate, swing up and down according to the transverse bottom plate in the disk drive of this most preferred embodiment 20, simultaneously, the outshot 20p of its front end and 33 engagements of the cam track in the cam gear 30.As mentioned above, this cam track 33 comprises top and bottom

water level line

33a and 33c, and connects the chute 33b (seeing Figure 24-29) in these horizontal roads.The vertical position of the front end of transverse bottom plate 20 by with these three road 33a-33c of outshot 20p engagement in that part determine, promptly determine by the rotation direction and the distance of cam gear 30.Therefore, transverse bottom plate 20 is according to rotation direction and distance swing rotationally up and down around transverse bottom plate 20 rear part edges of cam gear 30.

Can find out significantly that thus an edge of transverse bottom plate 20 is supported on and drives on the base plate 10, can be with respect to driving base plate 10 vertical oscillations.More particularly, cam gear 30 makes the other end of transverse bottom plate 20 move up and down by from loading the power rotation that drive gear set 61 is transmitted, thereby the front portion of transverse bottom plate 20 swings up and down with respect to driving base plate 10.Thus, can be used to swing up and down transverse bottom plate 20, therefore can raise or reduce turntable 5, and make dish 9 along with rotation from the driving force of a motor (i.e. second motor 4).

When cam gear 30 counterclockwise rotated as Figure 13 and continuation shown in Figure 180, the outshot 20p of transverse bottom plate 20 and cam track 33 position engaged moved to bottom water level line 33c from the upper water level line through chute 33b.

When transverse bottom plate 20 during as Fig. 9 and location shown in Figure 14, outshot 20p engagement upper water level line 33a, transverse bottom plate 20 is parallel to as shown in Figure 6 that to drive base plate 10 fixing, and the top of transverse bottom plate 20 flushes with the top that drives base plate 10 basically.So coil on 9 planes that can be sandwiched in and be fixed between turntable 5 and the detecting device 96.

When feed rack 40 moved forward above a specific range shown in Figure 10-13 and Figure 15-18, cam gear 30 began to rotate, and the outshot 20p process chute 33b of transverse bottom plate 20 is to mesh with the horizontal road 33c of the lower curtate of cam track 33.

This causes transverse bottom plate 20 in its back-end to lower swing, makes it favour and drives base plate 10, as shown in Figure 7.This moving of transverse bottom plate 20 also reduced turntable 5, makes it downward-sloping.The result is, dish 9 can be pulled to from the outside of disk drive 1 turntable 5 above the position, perhaps above turntable 5, be ejected into the outside of disk drive 1, dish 9 or turntable 5 do not influence the loading or unloading of dish 9.

When transverse bottom plate 20 with respect to drive base plate 10 slope downwardly into an ad-hoc location (the outshot 20p of transverse bottom plate 20 through chute 33b and with the bottom water level line 33c position engaged of cam track 33) time, the tooth 30g of cam gear 30 meshes with the carriage drive gear of disk holder 56.So carriage 55 swings to a downward position reliably along with transverse bottom plate 20 and is driven.

Therefore, (when the dish loading or unloading) can avoid the influence of carriage 55 (with the dish on it) and turntable 5 reliably when carriage 55 is driven.

When transverse bottom plate 20 tilts (seeing Figure 13, Figure 18 and Fig. 7), the 3rd loading gear 64 also tilts and meshes with the tooth 30g of cam gear 30.As mentioned above, and as shown in figure 29, the profile of the longitudinal cross-section of these teeth 30g is axle Lg crooked or that favour cam gear 30.The result is that

gear

64 and 30g can mesh reliably and smoothly.

In addition, when feed rack 40 (being optical pickup 6) moves to front and transverse bottom plate 20 inclinations, the forward edge of feed rack 40 is along with the rear portion that travels forward contact and promote the extension 75c of backstay 75 forward of feed rack 40, shown in Figure 14-18.This makes and moves forward under the guiding of the gathering sill 73s of adjuster bar 75s in the pedestal 73b of rocking bar 73 of backstay 75.Then, as mentioned above, adjuster bar 75s is installed in the locating slot 13 that drives in the base plate 10, then about location transverse bottom plate 20 and drive base plate 10.

When feed rack 40 was mobile backward in the opposite direction, the power of spring section 73c is running fix bar 75 backward.This is because the front portion of the extension 75c of backstay 75 contacts the spring section 73c of rocking bar 73, so, the constant backstay 75 that promotes backward of spring section 73c.

When transverse bottom plate 20 with drive base plate 10 tops and flush substantially parallel fixedly the time, by the engagement outshot 32p of the unci on the engagement with cams device 30 32 and the cam track 27 in transverse bottom plate 20 front portions, drive base plate 10 and transverse bottom plate 20 location, front and back each other.

Figure 19 and Figure 20 show a kind of like this state, and wherein motor gear 4G goes up in same direction (counterclockwise) and further driven by second motor 4, and cam gear 30 is further rotated by the loading drive gear set 61 that gets involved.The input gear 56A of carriage drive gear 56 not with the tooth 30g of transverse bottom plate 20 engagement, and be positioned at smooth 34 with the state shown in Fig. 9-13.Therefore, the rotation of cam gear 30 is not delivered to carriage drive gear 56, and carriage drive gear 56 does not rotate.

But when cam gear 30 turned to position shown in Figure 19 and Figure 20, the tooth of cam gear 30 began the input gear 56A engagement with carriage drive gear 56, and carriage drive gear 56 rotates along with the rotation of cam gear 30.Then, the engagement of output gear 56B and rack bracket tooth 55g by carriage drive gear 56, carriage 55 is pulled to the front portion, as shown in Figure 21.

Described the outside that carriage 55 is moved to driver from the inside of disk drive 1 above should be noted that, promptly separated disk stripping 9 and ejection tray 9 from the signal reproduction state.For carriage 55 is sent into inside from the outside of disk drive 1, second motor 4 is driven with opposite direction according to the circuit for controlling motor of circuit board 2, makes motor gear 4G begin clockwise direction and rotates.The result is, can realize following a series of actions, and CD 9 is sent into disk drive 1, clamping disk(-sc), and ready signal reproduces.

As mentioned above, the disk drive of most preferred embodiment comprises according to the present invention: one drives the transverse bottom plate 20 that base plate 10 and its that separates are gone up assembling turntable 5, and transverse bottom plate 20 is supported on the driving base plate 10 and can swings up and down thereon.By one forwards to (first direction of rotation) go up or opposite direction on the independent motor of continuous drive (second motor 4), can realize successively continuously: mobile optical pickup 6, raise and reduce turntable 5 and transport dish 9.Therefore, when loading or unloading dish 9, can avoid influencing turntable 5, and need not move up and down dish 9.Different with the disk drive of routine, needn't be provided for the dish fixator of rising dish.

In addition, use the transverse bottom plate 20 that is equipped with turntable 5 on it in the operation that drives vertical oscillation on the base plate 10, also can be on turntable 5 and get loose from it (not clamping) dish 9 fixing (clampings).Therefore, different with the disk drive of routine, needn't drive clamp system (chuck) up and down.

In addition, coil 9 because use an independent motor (second motor 4) to drive optical pickup 6, raise and reduce turntable 5 and transport, can use two motor operation disk drives 1 altogether, promptly described second motor 4 and the spindle motor (first motor) 3 that is used for driving rotationally turntable 5.By reducing the number of the motor that uses, simplified the structure of disk drive 1, more stably the excellent operation of holding element part.

In CD drive according to a first aspect of the invention, be provided with first base plate and second base plate, first base plate comprises the under(-)chassis of disk drive, second base plate separates with first base plate.Second backplanes support is on first base plate, can vertically move or swing with respect to first base plate, can be forward (on the first direction that rotates) or the independent motor (the second above-mentioned motor) of continuous drive in the opposite direction so that carry out following operation successively basically continuously: mobile optical pickup, rising or reduce turntable and moving CD; Perhaps carry out these operations in the opposite direction basically continuously by opposite order.Therefore, can avoid the influence between when loading or unloading dish turntable and the dish, and needn't move up and down dish.Different with the disk drive of routine, needn't be provided for the dish fixator of rising dish.

In addition, use the operation of second base plate vertical oscillation on first base plate that is equipped with turntable on it, can be dish fixing (clamping) on turntable and from it, get loose (not clamping) yet.Therefore, different with the disk drive of routine, needn't drive clamp system (chuck) up and down.

In addition,, can use two motor operation disk drives altogether because use an independent motor (second motor) to drive optical pickup, rising and reduction turntable and transport dish, promptly described second motor and be used for driving rotationally first motor of turntable.By reducing the number of the motor that uses, simplified the structure of disk drive, more stably the excellent operation of holding element part.

In CD drive according to a second aspect of the invention, second base plate is arranged on the inside of the opening in first base plate, and is so supported, and makes second base plate to swing vertically around the one end with respect to first base plate.More particularly, cam gear is by rotating from loading the next driving force of drive gear set transmission, and the other end sidepiece of second base plate is raised along with the rotation of cam gear or reduces.The result is that second base plate swings up and down with respect to one distolateral that is hinged on second base plate first base plate on every side.

Except benefit, also can use the driving force of an independent motor (second motor) to drive and make second base plate to rotate (promptly raise and reduce turntable) up and down, and transport (loading and unloading) dish with respect to first base plate according to first aspect present invention.

Therefore, except the benefit of the above-mentioned aspect of the present invention, also can determine reliably and accurately locate the vertical location of the other end sidepiece of second base plate with respect to first base plate.The result is that the element on the element on first base plate and second base plate can accurately mesh with corresponding element reliably.

In CD drive according to fifth aspect present invention, when second base plate swings to an ad-hoc location downwards with respect to first base plate, the carriage drive gearing mesh of the outer rotor of cam gear part and disk holder.So, swinging to downwards behind the first base plate certain position at second base plate, carriage is driven.

Therefore, except the benefit of the above-mentioned aspect of the present invention, (when dish is transported) also can avoid the influence between carriage (being the dish on the carriage) and the turntable reliably when carriage is driven.

In the CD drive according to sixth aspect present invention, behind the inner periphery position that optical pickup is moved to optical disc data signal record zone, feed rack can be moved to from interior all sides of CD specific location far away.By moving to this specific location, perhaps from moving to the outer circumferential side of dish at the described ad-hoc location of interior all sides, the driving force bang path of second motor before and after the feed rack in interior all sides.

Therefore, except the benefit of the above-mentioned aspect of the present invention, also can use an independent motor (second motor) to drive the signal read operation of optical pickup, and switch the driving force bang path of second motor.

In the CD drive according to seventh aspect present invention, because feed rack moves the ad-hoc location that exceeds other end sidepiece, adjuster bar is driven from the other end sidepiece of second base plate and protrudes.So adjuster bar enters the locating slot in first base plate, on perpendicular to the direction of feed rack traffic direction, determine the lateral attitude of second base plate thus with respect to first base plate.

Therefore, except the benefit of the above-mentioned aspect of the present invention, also can accurately reliably locate the lateral attitude of the other end sidepiece of second base plate with respect to first base plate.In addition, element on first base plate and the element on second base plate can accurately mesh with corresponding element reliably.In addition, use other end sidepiece and location second base plate of the removable feed rack of driving force of an independent motor (second motor) to second base plate.

In the CD drive according to eighth aspect present invention, because the hook-shaped part of cam gear and this bending road engagement, second base plate can be located with respect to first base plate on the feed rack traffic direction in addition reliably.The result is that the element on the element on first base plate and second base plate can accurately mesh with corresponding element reliably.

In CD drive according to ninth aspect present invention, except the benefit of the above-mentioned aspect of the present invention, different with the disk drive of routine, second base plate is not to be supported on rigidly on first base plate, but is supported on first base plate in the determined limit of the elasticity of buffer unit showyly.

The result is, buffer unit can absorb strong impact or the vibrations that are applied on the CD drive, thereby on preventing that impulsive force or shaking force directly are delivered to driver part on second base plate from first base plate.This means that disk drive has improved durability and shock resistance and anti-vibration resistance.

In addition, by such support second base plate, promptly it can float in the elastic range of buffer unit on first base plate, can regulate the relative positions on first base plate and second base plate in the showy scope of first base plate.Compare with the conventional disk drive of element rigid support, lower according to the part manufacturing and the assembly precision requirement of disk drive of the present invention, therefore can in manufacture process, boost productivity.

Although described the present invention in conjunction with most preferred embodiment with reference to accompanying drawing, but it should be noted that, those skilled in the art can carry out various conspicuous variations or modification, unless they break away from the present invention, these variations and modification all are included in the claim restricted portion of enclosing.

Claims

1, a kind of CD drive has a turntable, is used for supporting CD rotationally; An optical pickup is used for data-signal is written in the CD that rotates on the turntable, and/or the data-signal of playback record on described CD; The read head driving mechanism is used for two-way mobile optical pickup between interior all sides of CD and outer circumferential side; And a disk holder, be used for two-way moving CD between the primary importance and the second place, at the primary importance place, CD is on turntable, and at second place place, CD is in the outside of disk drive, and this CD drive comprises:

One first base plate, it comprises the under(-)chassis of disk drive; And

Second base plate, it separates with first base plate, and second backplanes support can vertically move or swing with respect to first base plate on first base plate, and is provided with described turntable and drives first motor that described turntable rotates, and optical pickup and read head driving mechanism;

Wherein, be arranged on and on first and/or second base plate be:

One is loaded driving mechanism, is used to drive described disk holder,

Can be on both forward and reverse directions driven second motor, be used for providing driving force to described loading driving mechanism and read head driving mechanism, and

Driving force bang path switching mechanism is used for arriving the driving force bang path that switches second motor between the path of read head driving mechanism in transmission power to path of loading driving mechanism and transmission power;

By described second motor of continuous drive on the first direction that rotates, can carry out following operation successively basically continuously: move described optical pickup, rising or reduce turntable and moving CD,

By going up described second motor of continuous drive in the opposite direction, can carry out these operations in the opposite direction basically continuously by opposite order with the described first party of rotating.

2, CD drive as claimed in claim 1 is characterized in that, described second base plate is arranged on the inside of the opening in first base plate, and is so supported, and makes second base plate to swing vertically around the one end with respect to first base plate;

First base plate comprises a near cam gear the other end sidepiece that is arranged on second base plate, and described cam gear has cam track on its outer surface, is used to raise and reduces the described other end of described second base plate;

Described loading driving mechanism comprises that is loaded a drive gear set, and it comprises a plurality of gears that comprise final output gear;

The engagement of the final output gear of described loading drive gear set and the outer toothed portion of cam gear to rotate described cam gear, raises thus or reduces the opposite side of described second base plate.

3, CD drive as claimed in claim 2 is characterized in that, the profile of the outer rotor part of the cam gear seen in the longitudinal cross-section is camber line or the straight line that approaches described camber line;

Described camber line is along vertical circular paths of motion, and the described final output gear of loading drive gear set is along with the oscillating motion of second base plate moves along this path.

As claim 2 or 3 described CD drive, it is characterized in that 4, an outshot is arranged on the other end sidepiece of described second base plate, and

The other end sidepiece of described second base plate is vertically located by the cam track in the described outshot engagement with cams device.

As any one described CD drive among the claim 2-4, it is characterized in that 5, described disk holder comprises a carriage drive gear that is used for driven bracket, is placed with a dish on this carriage,

When second base plate swings to an ad-hoc location downwards with respect to first base plate, the outer rotor of described cam gear part and described carriage drive gearing mesh.

6, as any one described CD drive among the claim 2-5, it is characterized in that, the read head driving mechanism comprises a feed rack that is used for mobile optical pickup, and a rack drives gear set that comprises a plurality of gears that is used to drive described feed rack

Behind the inner periphery position that optical pickup is moved to optical disc data signal record zone, described feed rack can be moved to from interior all sides of CD specific location far away,

By moving to this specific location and the engagement of driving force bang path switching mechanism in interior all sides, the second motor-driven power bang path switches to transmission power to the path of loading driving mechanism from the path to the read head driving mechanism thus, and

By from move to the outer circumferential side of dish at the described ad-hoc location of interior all sides, break away from driving force bang path switching mechanism thus, the described second motor-driven power bang path switches to the path of transmission power to the read head driving mechanism from transmission power to the path of loading driving mechanism.

7, CD drive as claimed in claim 6 is characterized in that, be arranged on second base plate to the telescopic adjuster bar of other end sidepiece,

The locating slot that can be engaged by described adjuster bar is arranged in described first base plate,

When described feed rack when a distolateral portion of second base plate moves to other end sidepiece and arrives an ad-hoc location, described feed rack and the engagement of described adjuster bar, and

When feed rack is further shifted to other end sidepiece after meshing with adjuster bar, described adjuster bar protrudes and enters described locating slot from the other end sidepiece of second base plate, locatees with respect to first base plate at second base plate that makes in a lateral direction perpendicular to the feed rack traffic direction thus.

As claim 6 or 7 described CD drive, it is characterized in that 8, cam gear comprises a unci that protrudes into the outside,

Second base plate comprises a crooked road that is parallel to the cam gear Outboard Sections in its surface, and

Described unci and described crooked road engagement are located second base plate with respect to first base plate on the feed rack traffic direction.

9, as any one described CD drive among the claim 2-8, it is characterized in that, elastic buffer unit be arranged on one be used for described one distolateral portion of second base plate is supported on the support component on first base plate and one be used for described cam gear is supported on support component on first base plate

Described second base plate is supported on first base plate in the elastic range of described buffer unit with afloat.